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        <p>距离上一篇zepto源码分析已经过去大半个月，想想自己都过意不去，不过之前分享了一篇node博客教程，还算干了点正事。接下来我们继续封装自己的库吧</p>
<h2 id="上节代码概览"><a href="#上节代码概览" class="headerlink" title="上节代码概览"></a>上节代码概览</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div></pre></td><td class="code"><pre><div class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</div><div class="line"></div><div class="line">	<span class="keyword">var</span> wclimb = &#123;&#125;,$</div><div class="line"></div><div class="line">	$ = <span class="function"><span class="keyword">function</span>(<span class="params">selector</span>)</span>&#123;</div><div class="line">		<span class="keyword">return</span> wclimb.init(selector)</div><div class="line">	&#125;</div><div class="line">	wclimb.init = <span class="function"><span class="keyword">function</span>(<span class="params">selector</span>)</span>&#123;</div><div class="line">		<span class="keyword">var</span> dom;</div><div class="line">		dom = <span class="built_in">document</span>.querySelectorAll(selector);</div><div class="line"></div><div class="line">		<span class="keyword">return</span> wclimb.Z(dom,selector)</div><div class="line"></div><div class="line">	&#125;</div><div class="line"></div><div class="line">	wclimb.Z = <span class="function"><span class="keyword">function</span>(<span class="params">dom,selector</span>)</span>&#123;</div><div class="line">		<span class="keyword">return</span> <span class="keyword">new</span> Z(dom,selector)</div><div class="line">	&#125;</div><div class="line">	wclimb.Z.prototype  =  Z.prototype  =  &#123;</div><div class="line">		test:<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</div><div class="line">			alert(<span class="number">1</span>)</div><div class="line">		&#125;</div><div class="line">	&#125;</div><div class="line">	<span class="function"><span class="keyword">function</span> <span class="title">Z</span>(<span class="params">dom,selector</span>) </span>&#123;</div><div class="line">		<span class="keyword">for</span> (<span class="keyword">var</span> i  =  <span class="number">0</span>; i &lt; dom.length; i++) &#123;</div><div class="line">			<span class="keyword">this</span>[i] = dom[i]</div><div class="line">		&#125;</div><div class="line">		<span class="keyword">this</span>.selector = selector;</div><div class="line">		<span class="keyword">this</span>.length = dom.length</div><div class="line">	&#125;</div><div class="line"></div><div class="line">	<span class="built_in">window</span>.$ = <span class="built_in">window</span>.wclimb = $</div><div class="line"></div><div class="line">&#125;)()</div></pre></td></tr></table></figure>
<h2 id="each方法"><a href="#each方法" class="headerlink" title="each方法"></a>each方法</h2><a id="more"></a>
<p>在<code>wclimb.Z.prototype=Z.prototype=</code>里面添加方法each</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div></pre></td><td class="code"><pre><div class="line">wclimb.Z.prototype  =  Z.prototype  =  &#123;</div><div class="line">	each:<span class="function"><span class="keyword">function</span>(<span class="params">callback</span>)</span>&#123;</div><div class="line">		[].every.call(<span class="keyword">this</span>, <span class="function"><span class="keyword">function</span>(<span class="params">el, idx</span>)</span>&#123;</div><div class="line">        <span class="keyword">return</span> callback.call(el, idx, el) !== <span class="literal">false</span></div><div class="line">      &#125;)</div><div class="line">      <span class="keyword">return</span> <span class="keyword">this</span>;</div><div class="line">	&#125;</div><div class="line">&#125;</div></pre></td></tr></table></figure>
<p>通过数组的<code>every</code>方法进行遍历，然后看看每次<code>callback</code>是不是都不是<code>false</code>，如果是则结束遍历</p>
<p>最后通过 <code>return this</code> 来达到链式调用的效果</p>
<h2 id="addClass方法"><a href="#addClass方法" class="headerlink" title="addClass方法"></a>addClass方法</h2><p>继续在里面添加addClass方法</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div></pre></td><td class="code"><pre><div class="line">addClass:<span class="function"><span class="keyword">function</span>(<span class="params">name</span>)</span>&#123;</div><div class="line">	<span class="keyword">if</span> (!name) <span class="keyword">return</span> <span class="keyword">this</span></div><div class="line">      <span class="keyword">return</span> <span class="keyword">this</span>.each(<span class="function"><span class="keyword">function</span>(<span class="params">el,idx</span>)</span>&#123;</div><div class="line">        <span class="keyword">if</span> (!(<span class="string">'className'</span> <span class="keyword">in</span> <span class="keyword">this</span>)) <span class="keyword">return</span></div><div class="line">        classList = [];</div><div class="line"></div><div class="line">        <span class="keyword">var</span> cls = className(<span class="keyword">this</span>) </div><div class="line">        <span class="comment">// newName = funcArg(this, name, idx, cls)</span></div><div class="line">        name.split(<span class="regexp">/\s+/g</span>).forEach(<span class="function"><span class="keyword">function</span>(<span class="params">klass</span>)</span>&#123;</div><div class="line"></div><div class="line">          <span class="comment">// if (!$(this).hasClass(klass)) </span></div><div class="line">          	classList.push(klass)</div><div class="line">          </div><div class="line">        &#125;, <span class="keyword">this</span>)</div><div class="line">      </div><div class="line">        classList.length &amp;&amp; className(<span class="keyword">this</span>, cls + (cls ? <span class="string">" "</span> : <span class="string">""</span>) + classList.join(<span class="string">" "</span>))</div><div class="line">     &#125;)</div><div class="line">&#125;</div></pre></td></tr></table></figure>
<ul>
<li>我们先判断<code>name</code>存在与否，没有就直接<code>return this</code>，支持链式调用</li>
<li>新建一个数组，存放我们要添加的<code>class</code>，因为可能要同时添加多个</li>
<li>通过调用<code>className</code>方法来获取之前的<code>class</code>，并保存起来。<code>clasName</code>方法在下面</li>
<li>我们添加<code>class</code>一般是这样<code>addClass(&#39;a b c&#39;)</code>，所以我们通过正则表达式把他们用空格分开<code>/\s+/g</code>,用<code>+</code>的原因是，可能会有多个空格的存在，接着对他们进行循环</li>
<li>通过hasClass判断之前是否已经存在需要添加的class，如果有就push到<code>classList</code>数组里面。我们先注释掉hasClass这段代码，因为其中用到了$(this) ,querySelector是不支持的哟，所以后面我们得作判断，判断$()这里面放的是元素、函数、类数组等等。</li>
<li>最后通过函数<code>className</code>方法把他们用空格连接起来</li>
</ul>
<p>发现里面有一个没有声明的<code>className</code>方法<br>所以我们在<code>wclimb.Z.prototype=Z.prototype=</code>上面声明该函数<br><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div></pre></td><td class="code"><pre><div class="line"><span class="comment">//获取或者设置class</span></div><div class="line"><span class="function"><span class="keyword">function</span> <span class="title">className</span>(<span class="params">node, value</span>)</span>&#123;</div><div class="line">	<span class="keyword">var</span> klass = node.className || <span class="string">''</span>	</div><div class="line"></div><div class="line"><span class="keyword">if</span> (value === <span class="literal">undefined</span>) <span class="keyword">return</span> klass</div><div class="line">	node.className = value</div><div class="line">&#125;</div></pre></td></tr></table></figure></p>
<p>该方法主要是获取class和设置class的作用</p>
<h2 id="hasClass方法"><a href="#hasClass方法" class="headerlink" title="hasClass方法"></a>hasClass方法</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div></pre></td><td class="code"><pre><div class="line">hasClass : <span class="function"><span class="keyword">function</span>(<span class="params">cls</span>) </span>&#123;</div><div class="line">    <span class="keyword">var</span> reg = <span class="keyword">new</span> <span class="built_in">RegExp</span>(<span class="string">'(\\s|^)'</span> + cls + <span class="string">'(\\s|$)'</span>);</div><div class="line">    <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i &lt; <span class="keyword">this</span>.length; i++) &#123;</div><div class="line">        <span class="keyword">if</span> (<span class="keyword">this</span>[i].className.match(reg)) <span class="keyword">return</span> <span class="literal">true</span>;</div><div class="line">            <span class="keyword">return</span> <span class="literal">false</span>;</div><div class="line">    &#125;</div><div class="line">    <span class="keyword">return</span> <span class="keyword">this</span>;</div><div class="line">&#125;</div></pre></td></tr></table></figure>
<p>通过正则匹配，如果存在则返回<code>true</code>，否则返回<code>false</code>，最后<code>return this</code>支持链式调用</p>
<p>现在来试试效果吧<br><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div></pre></td><td class="code"><pre><div class="line">html:</div><div class="line">	&lt;p <span class="class"><span class="keyword">class</span></span>=<span class="string">"a"</span>&gt;<span class="xml"><span class="tag">&lt;/<span class="name">p</span>&gt;</span></span></div><div class="line">js:</div><div class="line">	$(<span class="string">'p'</span>).addClass(<span class="string">'test other'</span>) <span class="comment">// &lt;p class="a test other"&gt;&lt;/p&gt;</span></div><div class="line">	<span class="built_in">console</span>.log($(<span class="string">'p'</span>).hasClass(<span class="string">'a'</span>)) <span class="comment">// true</span></div></pre></td></tr></table></figure></p>
<h2 id="代码"><a href="#代码" class="headerlink" title="代码"></a>代码</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div><div class="line">48</div><div class="line">49</div><div class="line">50</div><div class="line">51</div><div class="line">52</div><div class="line">53</div><div class="line">54</div><div class="line">55</div><div class="line">56</div><div class="line">57</div><div class="line">58</div><div class="line">59</div><div class="line">60</div><div class="line">61</div><div class="line">62</div><div class="line">63</div><div class="line">64</div><div class="line">65</div><div class="line">66</div><div class="line">67</div><div class="line">68</div><div class="line">69</div><div class="line">70</div><div class="line">71</div><div class="line">72</div><div class="line">73</div></pre></td><td class="code"><pre><div class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</div><div class="line"></div><div class="line">	<span class="keyword">var</span> wclimb = &#123;&#125;,$</div><div class="line"></div><div class="line">	$ = <span class="function"><span class="keyword">function</span>(<span class="params">selector</span>)</span>&#123;</div><div class="line">		<span class="keyword">return</span> wclimb.init(selector)</div><div class="line">	&#125;</div><div class="line">	wclimb.init = <span class="function"><span class="keyword">function</span>(<span class="params">selector</span>)</span>&#123;</div><div class="line">		<span class="keyword">var</span> dom;</div><div class="line">		dom = <span class="built_in">document</span>.querySelectorAll(selector);</div><div class="line"></div><div class="line">		<span class="keyword">return</span> wclimb.Z(dom,selector)</div><div class="line"></div><div class="line">	&#125;</div><div class="line">	wclimb.Z = <span class="function"><span class="keyword">function</span>(<span class="params">dom,selector</span>)</span>&#123;</div><div class="line">		<span class="keyword">return</span> <span class="keyword">new</span> Z(dom,selector)</div><div class="line">	&#125;</div><div class="line"></div><div class="line">	 <span class="function"><span class="keyword">function</span> <span class="title">className</span>(<span class="params">node, value</span>)</span>&#123;<span class="comment">//获取或者设置class</span></div><div class="line">	    <span class="keyword">var</span> klass = node.className || <span class="string">''</span>	 </div><div class="line"></div><div class="line">	    <span class="keyword">if</span> (value === <span class="literal">undefined</span>) <span class="keyword">return</span> klass</div><div class="line">	    node.className = value</div><div class="line"></div><div class="line">	  &#125;</div><div class="line"></div><div class="line">	wclimb.Z.prototype  =  Z.prototype  =  &#123;</div><div class="line">		each:<span class="function"><span class="keyword">function</span>(<span class="params">callback</span>)</span>&#123;</div><div class="line">			[].every.call(<span class="keyword">this</span>, <span class="function"><span class="keyword">function</span>(<span class="params">el, idx</span>)</span>&#123;</div><div class="line">	        <span class="keyword">return</span> callback.call(el, idx, el) !== <span class="literal">false</span></div><div class="line">	      &#125;)</div><div class="line">	      <span class="keyword">return</span> <span class="keyword">this</span>;</div><div class="line">		&#125;,</div><div class="line">		addClass:<span class="function"><span class="keyword">function</span>(<span class="params">name</span>)</span>&#123;</div><div class="line">			<span class="keyword">if</span> (!name) <span class="keyword">return</span> <span class="keyword">this</span></div><div class="line">	      	<span class="keyword">return</span> <span class="keyword">this</span>.each(<span class="function"><span class="keyword">function</span>(<span class="params">el,idx</span>)</span>&#123;</div><div class="line">		        <span class="keyword">if</span> (!(<span class="string">'className'</span> <span class="keyword">in</span> <span class="keyword">this</span>)) <span class="keyword">return</span></div><div class="line">		        classList = [];</div><div class="line"></div><div class="line">		        <span class="keyword">var</span> cls = className(<span class="keyword">this</span>) </div><div class="line">		       </div><div class="line">		        name.split(<span class="regexp">/\s+/g</span>).forEach(<span class="function"><span class="keyword">function</span>(<span class="params">klass</span>)</span>&#123;</div><div class="line"></div><div class="line">		          <span class="comment">// if (!$(this).hasClass(klass))</span></div><div class="line">		           classList.push(klass)</div><div class="line"></div><div class="line">		        &#125;, <span class="keyword">this</span>)</div><div class="line">		       </div><div class="line">		        classList.length &amp;&amp; className(<span class="keyword">this</span>, cls + (cls ? <span class="string">" "</span> : <span class="string">""</span>) + classList.join(<span class="string">" "</span>))</div><div class="line"></div><div class="line">		    &#125;)</div><div class="line">		&#125;,</div><div class="line">		hasClass : <span class="function"><span class="keyword">function</span>(<span class="params">cls</span>) </span>&#123;</div><div class="line">		    <span class="keyword">var</span> reg = <span class="keyword">new</span> <span class="built_in">RegExp</span>(<span class="string">'(\\s|^)'</span> + cls + <span class="string">'(\\s|$)'</span>);</div><div class="line">		    <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i &lt; <span class="keyword">this</span>.length; i++) &#123;</div><div class="line">		        <span class="keyword">if</span> (<span class="keyword">this</span>[i].className.match(reg)) <span class="keyword">return</span> <span class="literal">true</span>;</div><div class="line">		            <span class="keyword">return</span> <span class="literal">false</span>;</div><div class="line">		    &#125;</div><div class="line">		    <span class="keyword">return</span> <span class="keyword">this</span>;</div><div class="line">		&#125;</div><div class="line">	&#125;</div><div class="line">	</div><div class="line">	<span class="function"><span class="keyword">function</span> <span class="title">Z</span>(<span class="params">dom,selector</span>) </span>&#123;</div><div class="line">		<span class="keyword">for</span> (<span class="keyword">var</span> i  =  <span class="number">0</span>; i &lt; dom.length; i++) &#123;</div><div class="line">			<span class="keyword">this</span>[i] = dom[i]</div><div class="line">		&#125;</div><div class="line">		<span class="keyword">this</span>.selector = selector;</div><div class="line">		<span class="keyword">this</span>.length = dom.length</div><div class="line">	&#125;</div><div class="line"></div><div class="line">	<span class="built_in">window</span>.$ = <span class="built_in">window</span>.wclimb = $</div><div class="line"></div><div class="line">&#125;)()</div></pre></td></tr></table></figure>
      
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                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  

  

  

</body>
</html>
